Influence of dietary levels of wheat distillers' dried grains with solubles and two values of standardised ileal digestible amino acids on broiler growth performance
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This study investigated the impact that different inclusion levels of wheat distillers dried grains with solubles (wDDGS) in the diet had on broiler performance. From 0 to14 days old, 784 Ross 308 male broiler chickens were fed a standard diet containing 50g/kg wDDGS. In a factorial design, birds were allocated to one of eight treatments (7 replicates each) for the following 14 days each of the grower and finisher phases. Diets contained 0, 60, 120 or 180g/kg wDDGS and were formulated using 1.0 or 0.6 SIAAD values for the wDDGS. All diets contained wheat and soya, were isocaloric, with amino acid ratios balanced according to Ross recommendations. Birds and feed were weighed at 14, 28 and 42 days. Feed intake, weight gain, feed efficiency and mortality were calculated for each phase and data analysed using GLM procedure of SAS. Increasing DDGS level decreased (P < 0.05) feed intake and increased FCR in the grower and fin-isher phases, respectively but overall, feeding up to 180 g/kg wDDGS had no effect on feed intake, FCR or final body-weight. Undervaluing the SIAAD levels of wDDGS at 0.6 reduced (P < 0.05) overall gain and final body weight across wDDGS. It is concluded that wDDGS offers a sustainable alternative to conventional ingredients in broiler diets but its standardised digestible amino acids needs to be adequately characterised.
Other Titles/Title of Conference
20th European Symposium on Poultry Nutrition, Prague, Czech Republic